# Copyright (c) 2023 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import unittest

from paddlenlp.metrics import Distinct


class TestDistinct(unittest.TestCase):
    def test_metrics(self):
        distinct = Distinct()
        cand = ["The", "cat", "The", "cat", "on", "the", "mat"]
        distinct.add_inst(cand)
        self.assertEqual(distinct.score(), 0.8333333333333334)
